Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc66e9ab72e48018…

MALICIOUS

PDF

41.1 KB Created: 2020-07-21 09:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f0965d1ace129b54e79c751edbdc40 SHA-1: 5669d688b2db389a501aaf1bf1d739795c8419eb SHA-256: dc66e9ab72e48018f97ee9456bc18129e2edd01eb171472701e75db295081e87
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a PDF link farm designed for SEO manipulation. The document body, though heavily obfuscated, appears to reference 'Globe g12 manual meat slicer' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=globe%20g12%20manual%20meat%20slicer
    • http://files.kelsipontonart.com/uploads/1/3/2/6/132681450/barufubepufi.pdf
    • http://files.tlc-nanbpwc.org/uploads/1/3/1/4/131454791/bowejozamepab-nazojaj.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • http://files.thepdavisphotography.com/uploads/1/3/0/7/130775366/novavuw_vazileb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/sijadiwup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/mawujuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/sedilodupuxuzozeduzoga.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/44343435221.pdf
    • https://pabawadoxoxe.files.wordpress.com/2020/06/fiziz.pdf
    • https://senowad.files.wordpress.com/2020/07/83684331982.pdf
    • https://zojozug.files.wordpress.com/2020/07/67792573777.pdf
    • https://kezofibutifa.files.wordpress.com/2020/06/66680342455.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/suxipekakatapobunol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/velix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/nefewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/fuwomiviwori.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/regizejusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/11943768093.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/doleraki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/92320603660.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643f.bin
1c3cb3a29fdeaab35b5bf9fc42d72e15f7cc9e29ad9271268ff4397b498f0c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 5356 bytes
font_01_sfnt_off00007663.bin
9eb219ae74c6721dc78022be25025f9545a6e625a6aa0df0a26da67e28b1bb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7663 9568 bytes

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